Rastan Saga uses a side-view perspective. The player advances through linear stages filled with platforms, hazards, enemies, ladders, items, and boss encounters. The main objective is to survive each area and defeat its final guardian.

Rastan attacks with his equipped weapon, jumps across gaps, climbs where the stage allows it, and collects temporary equipment or abilities. Progression is based on clearing stages rather than building a persistent character, so careful positioning, enemy timing, and preservation of lives are central to success.

Learn enemy attack patterns before advancing, especially near ledges and narrow platforms. Keep moving, but avoid jumping blindly into areas where enemies can attack from above or below.

Collect useful weapons and armor when it is safe to do so, and save lives by treating boss encounters as pattern-learning exercises rather than rushing into close combat.